Finding the Fourth Proportional to 83,684.57, 125,526.78 and 21,355.07

Step by Step Solution

1. Step 1: Write the proportion equation
   83,684.57 : 125,526.78 = 21,355.07 : x
2. Step 2: Convert to fraction form
   83,684.57/125,526.78 = 21,355.07/x
3. Step 3: Cross multiply
   83,684.57x = 125,526.78 × 21,355.07
4. Step 4: Simplify right side
   83,684.57x = 2,680,633,173.77
5. Step 5: Solve for x
   x = 2,680,633,173.77/83,684.57
6. Step 6: Final answer
   x = 32,032.59